[clang] [llvm] [NVPTX] Add NVVMUpgradeAnnotations pass to cleanup legacy annotations (PR #119261)

[Artem Belevich via llvm-commits]

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@@ -5911,31 +5911,21 @@ bool llvm::omp::isOpenMPKernel(Function &Fn) {
 
 KernelSet llvm::omp::getDeviceKernels(Module &M) {
   // TODO: Create a more cross-platform way of determining device kernels.
-  NamedMDNode *MD = M.getNamedMetadata("nvvm.annotations");
   KernelSet Kernels;
 
-  if (!MD)
-    return Kernels;
-
-  for (auto *Op : MD->operands()) {
-    if (Op->getNumOperands() < 2)
-      continue;
-    MDString *KindID = dyn_cast<MDString>(Op->getOperand(1));
-    if (!KindID || KindID->getString() != "kernel")
-      continue;
-
-    Function *KernelFn =
-        mdconst::dyn_extract_or_null<Function>(Op->getOperand(0));
-    if (!KernelFn)
-      continue;
-
-    // We are only interested in OpenMP target regions. Others, such as kernels
-    // generated by CUDA but linked together, are not interesting to this pass.
-    if (isOpenMPKernel(*KernelFn)) {
-      ++NumOpenMPTargetRegionKernels;
-      Kernels.insert(KernelFn);
-    } else
-      ++NumNonOpenMPTargetRegionKernels;
+  for (auto &F : M) {
+    // TODO: unify this check with isKernelFunction in NVPTXUtilities.
+    if (F.hasFnAttribute("nvvm.kernel")) {
+
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Artem-B wrote:

Nit: unintentional empty line?

https://github.com/llvm/llvm-project/pull/119261